synthpunks

Synth(etic) Punks - (Free Unlimited) 24×24 Pixel Punks For Everyone

synthpunks - (free unlimited) 24×24 pixel punks for everyone - yes, you can - generate / claim your own synth(etic) punks ("off-blockchain") for your own (ethereum) account 40-hexdigit addresses e.g. 0x054f3b6eadc9631ccd60246054fdb0fcfe99b322; incl. 2x/4x/8x zoom for bigger sizes and more

• home :: github.com/cryptopunksnotdead/cryptopunks
• bugs :: github.com/cryptopunksnotdead/cryptopunks/issues
• gem :: rubygems.org/gems/synthpunks
• rdoc :: rubydoc.info/gems/synthpunks

Background - What are "On-Chain" Synthetic (Crypto) Punks V1?

Fully on-chain (crypto) punks for every ethereum address. Check yours out for free!

-- syntheticpunks.com

Stephan Cilliers (from South Africa) has put together an open-source blockchain service ( - see stephancill/synthetic-punks - ) to generate for free¹ 24×24 punk pixel heads for every ethereum address (account).

¹: and optionally claim / mint a (non-fungible) token for a 0.02 ether fee.

The F.A.Q. reads:

Q: What are Synthetic Punks?

A: Synthetic Punks is inspired by the historical collection of 10 000 Matt & John's® Punks [Anno 2017] by Larva Labs and Synthetic Loot by Dom Hofmann. It generates a unique, fully on-blockchain punk for each Ethereum address.

They are free to view for any address, but can be claimed [minted] as an ERC-721 non-fungible token (NFT) for a price of 0.02 ether.

Features - Each Synthetic Punk

• Is generated from assets stored fully on-blockchain
• Is uniquely associated with an ethereum wallet address
• Supports Ethereum Name Service (ENS) in its metadata

"Off-Chain" Usage In Your Script

Anyways, the synthpunks gem / library is inspired by Synthetic Punks V1 by Stephan Cilliers (see above) and lets you generate punks using the "original" Synthetic Punks V1 pseudo-random number and image generation formula "off-blockchain"¹ using the "original" Synthetic Punks V1 spritesheet

and attribute categories (ranges) and names.

Let's try the (ethereum) address 0x054f3b6eadc9631ccd60246054fdb0fcfe99b322:

require 'synthpunks'

punk = Synthpunks::Image.generate('0x054f3b6eadc9631ccd60246054fdb0fcfe99b322' )
punk.save( 'punk1.png' )
punk.zoom(8).save( '[e-mail]' )

resulting in:

8x

Tip: Use Synthpunks.getTokenID( addr ) to get the "official" token id from the address (that really is only a "convenience" helper that converts the 40-digit / 20-byte hexstring to a decimal (big) integer number). Example:

Synthpunks.getTokenID('0x054f3b6eadc9631ccd60246054fdb0fcfe99b322' )
#=> 30311890011735557186986086868537068337617285922

# note: yes, Synthpunks.getTokenID same as String#to_i(16)
'0x054f3b6eadc9631ccd60246054fdb0fcfe99b322'.to_i( 16 )
#=> 30311890011735557186986086868537068337617285922

And use the new exclusive "off-chain" only Synthpunks.getAssetNames( id ) helper to get all (random) punk attributes by name.

Synthpunks.getAttributeNames( 30311890011735557186986086868537068337617285922 )
#=> ["Alien", "Clown Nose", "Frown", "Vape", "Eyebrows"]

Now look up the minted Synthetic (Crypto) Punks V1 on the open sea (secondary) market:

Minted Synthetic Punk for 0x054f3b6eadc9631ccd60246054fdb0fcfe99b322 with Token ID #30311890011735557186986086868537068337617285922 @ Open Sea

Or see Synthetic Punk for 0x054f3b6eadc9631ccd60246054fdb0fcfe99b322

And spot the differencence - hint: none other than the "dark / black-ish" background is missing.

Let's retry and let's add the "dark / black-ish" background that is, #1A1A1A, using the rgb hex color code:

punk = Synthpunks::Image.generate('0x054f3b6eadc9631ccd60246054fdb0fcfe99b322' )
punk = punk.background( '#1A1A1A' )
punk.save( 'punk1b.png' )
punk.zoom(8).save( '[e-mail]' )

resulting in:

8x

Or for fun let's try some more new "custom" backgrounds. Example: Stand with Ukraine / Ukraine Flag:

punk = Synthpunks::Image.generate('0x054f3b6eadc9631ccd60246054fdb0fcfe99b322' )
punk = punk.background( 'ukraine' )
punk.save( 'punk1c.png' )
punk.zoom(8).save( '[e-mail]' )

resulting in:

8x

or

punk = punk.background( 'rainbow' )

resulting in:

8x

and so on.

Tip: Looking for left-looking phunks? Try Image#mirror. Example:

punk = Synthpunks::Image.generate('0x054f3b6eadc9631ccd60246054fdb0fcfe99b322' )
phunk = punk.mirror
phunk.save( 'phunk1.png' )
phunk.zoom(8).save( '[e-mail]' )

resulting in:

8x

Bonus Tip: Derive your own custom default profile pictures using Image#silhouette. Example:

punk = Synthpunks::Image.generate('0x054f3b6eadc9631ccd60246054fdb0fcfe99b322' )
punk = punk.silhouette( '0x647785' ).background( '0xCCD5DE' )
punk.save( 'punk1-default1.png' )
punk.zoom(8).save( '[e-mail]' )

resulting in:

8x

or is blue the new gray?

punk = punk.silhouette( '0x4474E0' ).background( '0xA0C2FF' )

resulting in:

8x

and so on.

Yes, you can. Let's try some more (ethereum) addresses.

punk = Synthpunks::Image.generate( '0x7a80ee32044f496a7bfef65af738fdda3a02cf02' )
punk.save( "punk2.png" )
punk.zoom(8).save( "[e-mail]" )

resulting in:

8x

and the attributes

tokenID = Synthpunks.getTokenID( '0x7a80ee32044f496a7bfef65af738fdda3a02cf02' )
#=> 699372119169819039191610289391678040975564001026
Synthpunks.getAttributeNames( tokenID )
#=> ["Human 1", "Rosy Cheeks", "Shadow Beard", "Wild Hair", "VR"]

and compare with the "original" with the attributes:

• Human 1
• Rosy Cheeks
• Wild Hair
• VR
• Shadow Beard

Minted Synthetic Punk for 0x7a80Ee32044F496A7bFeF65Af738FddA3a02CF02 with Token ID #699372119169819039191610289391678040975564001026 @ Open Sea

Or see Synthetic Punk for 0x7a80Ee32044F496A7bFeF65Af738FddA3a02CF02

and so on.

¹: Yes, the (on-chain) solidity contract code got translated "by-hand" to (off-chain) ruby script.

Example - the entropy pseudo-random number generator source:

function randomUint(uint256 seed, uint256 offset) public view returns (uint256)
{
    require(offset < 32, "Offset out of bounds");
    bytes32 entropy = keccak256(abi.encodePacked(address(this), seed));
    bytes32 mask = bytes32(0xff << (offset * 8));
    uint256 out = uint256((entropy & mask) >> (offset * 8));
    return out;
}

and the matching ruby version:

ADDRESS = '0xaf9CE4B327A3b690ABEA6F78eCCBfeFFfbEa9FDf'

## note:
##   returns a random unit number between 0-255 (0-ff)
##     use offset (0-31),that is, byte out of byte32 entropy buffer/hash

def randomUint( seed, offset )
  # assert( offset < 32, "Offset out of bounds")
  entropy = keccak256( hex_to_bin( ADDRESS ) +
                       hex_to_bin( uint256_to_hex(seed)) )

  ##  note: pick a uint/byte (shorter version)
  bytes = entropy.bytes.reverse
  bytes[offset]
end

License

The scripts are dedicated to the public domain. Use it as you please with no restrictions whatsoever.

Questions? Comments?

Post them on the D.I.Y. Punk (Pixel) Art reddit. Thanks.